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, tnited gister parte aan.

J; H. OOLE, OE MILLRURY, As'sreNOR TO SAMUEL?. EMERSON AND AMO Y wnrTE,OE WOROEsTER, MrrssAOnusETTs.

Letters Patent No. 99,848, dated February 15, 1870.

MPRVED DIE AND PLUNG-ER.

The Schedule referred to in these Letters Patent and making part of thesamev Know all men by these presents:

That I, J. H. COLE, of Millbury, in the county of Worcester, andCommonwealth oflvlassachusetts, have inventedv certain new and usefulImprovements in Die and Plunger for making ferrules, tlrimbles, andother similar articles from blanks of cold wrought iron; `and I dohereby declare that the followings a full, clear, and exact descriptionof the same, reference being had to the accompanying drawings, forming apart of this specification, in whichr Figure 1 represents a perspectiveview of the die and plunger;

Figure 2 represents a vertical central section of the die, plunger', andApartially-formed thirnble; and

Figure 3 represents a perspective view of a ferrule or thirnble formedby the co-acting surfaces of the die and plunger.

To enable those skilled in the art, to which my invention belongs, tomake and use the saure, Irwill proceed to describe the said improvementmore in detail.

The nature of my present improvement consists in a particularimprovement on the device for which Letters Patent were granted to me onthe 28tlrday of April, A. l). 1868, as: will be hereafter explained.

Prior to my invention for which said Letters Patent were granted, allattempts to form ferrules or tlrirnbles from cold wrought iron provedunsuccessful.

'In the practice of n'ry said invention, however, I found that while itworked well on a uniform size and thickness of metal blanks, it was'nevertheless defect tive, irr'thatif the blank happened to be thick, itwould often form a ferrule with a bur or flange on .the edge a, while'vat the same time endangering the machineryby the sudden stoppage of theplunger. Then, again, foreign matter was liable to accumulate landadhere to the inside of the die, especially to the lower outersurface.Another ditiiculty arose ti'orn tr'ouble in removing the ferrule ortlrimble, and also to loss of power when the blank happened to be thick,which occasioned the sudden stoppage of the plunger, as beforeexplained. -j

' All of the foregoing objections are obviated by my y presentimprovement. f g

The die A is nrade with a circular'shoulden b, a gradually curved oropening part, c, these parts being curved and shaped as described in theLetters Patent above referred to. For the purposes already mentioned, I,however, form the bottomof the die in a manner different from that shownin said Letters Patent, that is to say, I make it with a straightportion,

d, and then with an enlarged or bottom part or hole, e.'

The operation is as follows;

The blank Of cold wrought met-al B is placed by the attendant upon `theshoulder' b, when the plunger C descends and forces the blank down overthe curved part c, and through the straight portion tl, into theenlarged part e.

From the foregoing description it will be seen that all the ferrules orthimbles will be of an uniform size, and further,4 that there will be nobur or flange left on the edge a, since `all the tlrimbles will beforced through the die by means of the.v plunger, and if the blanks varyin thickness, they will be drawn down to l.

a size as they'are forced through between the die A and plunger, C.

" After the ferrules and tlrimbles are made in theforrn shown in fig.3,'tang-holes of any desired forni may be punched through the closed endthereof.

Having described my device for making ferrules and l thimbles,

What I claim as my invention, and desire to secure by Letters Patent,is-f- As an improvement in the die fory which Letters Patent werevgranted me on the 28th April, 1868, the formation of the 'lower' portionof the die with the ,straight part cl and openingr e, substantially inthe manner and for the purposes herein shownv 'and specitied.l

y J. H. COLE.. `Witnesses r 'lnos.l H. DODGE,

ALBERT E. PEIRCE.

